The Pulley,groove, cataloged under National Stock Number 3020-01-377-4221, is classified within Federal Supply Class 3020 (Gears, Pulleys, Sprockets, and Transmission Chain) of the Mechanical Power Transmission Equipment group. The manufacturer of record is Palfinger Marine Usa, Llc. Government technical data includes 24 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 3020-01-377-4221 |
| Primary Part Number | 6-D-100 ITEM 3 |
| Item Name | Pulley,groove |
| FSC / FSG | 3020 / 30 — Gears, Pulleys, Sprockets, and Transmission Chain |
| Manufacturer | Palfinger Marine Usa, Llc |
| Status | ACTIVE |
| Integral Cooling Vane | NOT INCLUDED |
| Hub Outside Diameter | 20.0 MILLIMETERS NOMINAL BOTH ENDS MM |
| Bore Feature | INCLUDED |
| Split Hub Feature | NOT INCLUDED |
| Bore Length | 13.7 MILLIMETERS NOMINAL MM |
| Design Form | PLAIN |
| Groove Radius | 3.5 MILLIMETERS NOMINAL MM |
| Groove Shape | U |
| Outside Diameter | 51.0 MILLIMETERS NOMINAL MM |
| Style Designator | PLAIN |
| Groove Depth | 5.0 MILLIMETERS NOMINAL MM |
| Bore Type | STRAIGHT |
| Bearings | NOT INCLUDED |
| Groove Quantity | 1 |
| Protruding Hub Characteristic | PLAIN |
| Unable to Decode | UNABLE TO DECODE |
| Distance From Outside Flange/rim to Hub End and Location | 5.0 MILLIMETERS NOMINAL BOTH ENDS MM |
| Counterbore Feature | NOT INCLUDED |
| Bore Diameter | 12.0 MILLIMETERS NOMINAL MM |
| Material | STEEL OVERALL |
| Unable to Decode | UNABLE TO DECODE |
| Face Width | 12.7 MILLIMETERS NOMINAL MM |
| Groove Width | 7.0 MILLIMETERS NOMINAL MM |
| Lightening Hole | NOT INCLUDED |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | No hazard code in the DLA record (HMIC N) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 6-D-100 ITEM 3 PRIMARY | Palfinger Marine Usa, Llc (USA) |
| Reference | Meaning |
|---|---|
| 6-D-100 | D/9 Drawing number reference only Palfinger Marine Usa, Llc |
NSN 3020-01-377-4221 is a Pulley,groove, manufactured by Palfinger Marine Usa, Llc, classified under FSC 3020, Gears, Pulleys, Sprockets, and Transmission Chain. Status: active.
NSN 3020-01-377-4221 has 1 manufacturer part number on file: 6-D-100 ITEM 3 (Palfinger Marine Usa, Llc).
1 possible match (shared part number, not a government interchangeability claim): 3020-01-377-7839. Verify interchangeability with system specifications before substitution.
Key specifications for 6-D-100 ITEM 3: Integral Cooling Vane: NOT INCLUDED; Hub Outside Diameter: 20.0 MILLIMETERS NOMINAL BOTH ENDS MM; Bore Feature: INCLUDED; Split Hub Feature: NOT INCLUDED. 24 specifications are documented in the U.S. Government catalog.
No hazard code in the DLA record (HMIC N). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.